Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
College of Environmental Sciences and Engineering, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing, 100871, China.
Environ Sci Pollut Res Int. 2021 Mar;28(10):12587-12596. doi: 10.1007/s11356-020-11254-5. Epub 2020 Oct 20.
Although the production of polybrominated diphenyl ethers (PBDEs) has been phased out over the past decade worldwide, they are still potentially hazardous to the environment due to their persistence and toxicity. This study investigated the levels of 55 PBDEs in water and sediments from the Danjiangkou Reservoir, China. The levels of PBDEs were in the range of not detected (ND)-286.67 ng/L in water and ND-236.04 ng/g in sediments. BDE209 was the predominant PBDE congener and constituted 15-50% and 44-68% of the total PBDEs in water and sediments, respectively. Commercial pentaBDE products (70-5DE, DE-71) were the dominant source of tetraBDE, pentaBDE, and hexaBDE, while commercial octaBDE (79-8DE) and decaBDE (102E and 82-0DE) products were the main sources of nonaBDE and decaBDE in water. PBDEs in sediments mainly stemmed from commercial decaBDE products and combustion sources. BDE-209 posed high ecological risks to aquatic organisms and dominated the total ecological risks of PBDEs. No cancer risks and non-cancer risks were observed for PBDEs. A ranking method based on four criteria, i.e., detection frequency, concentration, ecological risk, and health risks, was proposed, and 17 PBDEs were identified as high priority PBDEs for future monitoring and management in the Danjiangkou Reservoir.
尽管在过去十年中，全世界已经逐步停止生产多溴二苯醚（PBDEs），但由于其持久性和毒性，它们仍然对环境构成潜在危害。本研究调查了中国丹江口水库水中和沉积物中 55 种 PBDEs 的水平。水中 PBDEs 的浓度范围为未检出（ND）-286.67ng/L，沉积物中为 ND-236.04ng/g。BDE209 是主要的 PBDE 同系物，分别占水中和沉积物中总 PBDEs 的 15-50%和 44-68%。商用五溴二苯醚（70-5DE、DE-71）产品是四溴、五溴和六溴的主要来源，而商用八溴二苯醚（79-8DE）和十溴二苯醚（102E 和 82-0DE）产品是九溴和十溴的主要来源。水中的 PBDEs 主要来自商用十溴二苯醚产品和燃烧源。沉积物中的 PBDEs 主要来自商用十溴二苯醚产品和燃烧源。BDE-209 对水生生物构成了高生态风险，主导了 PBDEs 的总生态风险。未观察到 PBDEs 的致癌风险和非致癌风险。提出了一种基于四个标准（即检出频率、浓度、生态风险和健康风险）的排序方法，确定了 17 种 PBDEs 为丹江口水库未来监测和管理的高优先级 PBDEs。
